CVE-2018-9275

In checkusertoken in util.c in the Yubico PAM module (aka pam_yubico) 2.18 through 2.25, successful logins can leak file descriptors to the auth mapping file, which can lead to information disclosure (serial number of a device) and/or DoS (reaching the maximum number of file descriptors).

References

Affected packages

Git / github.com/yubico/yubico-pam

Affected ranges

Type

GIT

Repo

https://github.com/yubico/yubico-pam

Events

Introduced

f5363a207b14d46b86022e598399a31201164594

Last affected

432d7c60a1f64bfd1ad05683392cec36c6bc8455

Fixed

0f6ceabab0a8849b47f67d727aa526c2656089ba

Database specific

{
    "cpe": "cpe:2.3:a:yubico:yubico_pam:*:*:*:*:*:yubico:*:*",
    "extracted_events": [
        {
            "introduced": "2.18"
        },
        {
            "last_affected": "2.25"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

2.*

2.18

2.19

2.20

2.21

2.22

2.23

2.24

2.25

Database specific

vanir_signatures_modified

"2026-07-08T12:28:53Z"

vanir_signatures

[
    {
        "target": {
            "file": "util.c"
        },
        "id": "CVE-2018-9275-73e96989",
        "digest": {
            "line_hashes": [
                "226607563752128757887514930765907415801",
                "279701570390930019583909742435872770862",
                "308494850977619412175153327874514612777",
                "203417458892300943278019038761638732730"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/yubico/yubico-pam/commit/0f6ceabab0a8849b47f67d727aa526c2656089ba"
    },
    {
        "target": {
            "function": "check_user_token",
            "file": "util.c"
        },
        "id": "CVE-2018-9275-fa157aba",
        "digest": {
            "function_hash": "119299559369141334615512022658670539382",
            "length": 1698.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/yubico/yubico-pam/commit/0f6ceabab0a8849b47f67d727aa526c2656089ba"
    }
]

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-9275.json"